Depth Resolution: Understand the multi-dimensional form of the IP address

Internet Protocol Address) is the cornerstone of equipment communications. Although we're used to seeing points of decimal. 192.168.1.1 But at the bottom of the computer, it's a 32-bit list or 128-bit list. Bit (IPv6) binary number. Understanding these different manifestations is essential for the development of network protocols and for trouble diagnosis.

Core differences between IPv4 and IPv6

Address space: IPv4 provides approximately 4.3 billion addresses, which are largely depleted; IPv6 provides as many as 340 addresses The twilight (10 ^36) is enough to give every single sand on Earth an independent IP.
Expression method: IPv4 Point-point Decimal; IPv6 uses a colon hexadecimal and supports the double-cam to compress zero.
Header structure: IPv6 Simplified the fixed header, removed the optional fields and improved the processing efficiency of routers.

Why do you need an IP conversion tool?

Scenario one: Database storage optimization. Storage point by decimal string (e. g.) 192.168.100.200 ) than store its corresponding unsigned integer ( 3232261320 It is more spatial and inefficient to index. This tool helps you quickly to calculate the integer value you have deposited in the database.

scene two: ACL Access Control List Configuration. Sometimes input is required in the form of hexadecimal IPs when configuration of firewalls or routers Or analyze a specific bit mask. You can see clearly the distribution of network and host spaces through the binary display of this tool.

How do you identify private and special addresses?

Not all IPs can make their route public on the Internet. For example, 10.0.0.0/8 、 172.16.0.0/12 and 192.168.0.0/16 It is a private address area reserved for Internet use. And... 127.0.0.1 The Loopback is the loopback, representing the device itself.